feat: Add submap connections (MIN-276)

Closes MIN-276

Objective:

Implement rendering pins for submap links to maps with at least one searched element

What has been done:

• submap connections state management
• selectors for finding number of active elements per map and submap links for render
• rendering of submap links pins
• unit tests

Important:

Why getSubmapConnectionsBioEntity reducer is implemented weird way? Because adding submapConnections as required field would also imply fixing >85 different tests which I've viewed as more dangerous than defining this field as optional with additional actions made in the reducer

This PR is based on !163 (merged) so some changes may not be relevant to submap connections feature if !163 (merged) is not merged

src/components/FunctionalArea/TopBar/SearchBar/SearchBar.component.tsx

@@ -66,6 +66,8 @@ export const SearchBar = (): JSX.Element => {
   };
 
   const handleSearchClick = (): void => {
+    if (!currentTab) return;
+
     openSearchDrawerIfClosed(currentTab);
   };